What are the major natural and man-made components of the climate system and climate change that both SRES and RCP address?

The image at the bottom gives a brief description of the various components in the climate system. The five interacting components are:

• The atmosphere,
• The hydrosphere,
• The cryosphere,
• The land surface, and
• The biosphere. 

Need to:

1. provide definitions for each component and its main function/role in the climate system